SLVT255 July   2026

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Safety Warning
    3. 1.3 Dimensions
    4. 1.4 Test Setup
  8. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Efficiency Data
    3. 2.3 Thermal Images
  9. 3Waveforms
    1. 3.1 Switching
    2. 3.2 Output Voltage Ripple
    3. 3.3 Start-Up Sequence
    4. 3.4 Dynamic Response
  10.   Trademarks

3.3 Start-Up Sequence

Start-up behavior is shown in Figure 3-7 through Figure 3-12. CH1: VIN, CH2: Gate of Q102 to GND, CH3: VCCP, CH4: LO, CH5: VOUT, and CH6: IRES

PMP41133 System Starts Up at VIN = 450V, and IOUT = 6.5A. The Maximum Value of CH2 is 343.8V and Stable at 243.8V Which is About Half of VIN Voltage. Figure 3-7 System Starts Up at VIN = 450V, and IOUT = 6.5A. The Maximum Value of CH2 is 343.8V and Stable at 243.8V Which is About Half of VIN Voltage.
PMP41133 Zoom in the Start-up Waveform at VIN = 450V and IOUT = 6.5A. VOUT Overshoot is 49.84V (3.8%) Figure 3-8 Zoom in the Start-up Waveform at VIN = 450V and IOUT = 6.5A. VOUT Overshoot is 49.84V (3.8%)
PMP41133 System Starts Up at VIN = 450V, and IOUT is in No Load. The Overshoot Voltage is 48.92V (1.92%) Figure 3-9 System Starts Up at VIN = 450V, and IOUT is in No Load. The Overshoot Voltage is 48.92V (1.92%)
PMP41133 System Starts-Up at VIN = 800V. The Maximum Value of CH2 is Clamped at 527V and Stable at 427V Which is About Half of VIN Voltage Figure 3-10 System Starts-Up at VIN = 800V. The Maximum Value of CH2 is Clamped at 527V and Stable at 427V Which is About Half of VIN Voltage
PMP41133 Zoom in the Start-up Waveform at VIN = 800V. VOUT Overshoot is 49.93V (4.0%) Figure 3-11 Zoom in the Start-up Waveform at VIN = 800V. VOUT Overshoot is 49.93V (4.0%)
PMP41133 System Starts-Up at VIN = 450V, and IOUT is in No Load. No Overshoot Voltage Figure 3-12 System Starts-Up at VIN = 450V, and IOUT is in No Load. No Overshoot Voltage